Digger for self-propelled harrows.



' E. M. QUELLEN NEC'. DIGGER FOR SELF PROPELLED. HARROWS.

APPL ICATION FILED APR. 30. 19W.

Patented Dec. 12, 1916.

In velzzor EDOUARD MARIE QUELLENNEC, OF PARIS, FRANCE.

BIGGER FOR SELF-PROPELLED I-IARBOWS.

Application filed April 30, 1910.

To all whom it may concern:

Be it known that I, EDOUARD MARIE QUEL- LnNNno, of 10 Rue de la Chaise,Paris, France, engineer, have invented a new and useful Improvement inDiggers for Self- Propelled Harrows, which improvement is fully setforth in the following specification.

My invention relates to improvements in plowing or digging machines, inwhich the shaft carrying the digging-teeth or plows is rotated; and theobjects of my improvement are, first, to reduce the amount of time andlabor spent in assembling and disassembling a plurality of parts of saidma chine; second, to provide a means for maintaining firmly in place aplurality of digger-supporting disks and rings, on the said shaft, incase the nuts on ends of the shaft should become loosened. I attainthese objects by the mechanism illustrated in the accompanying drawing,in which- Figure 1 is a top View of the machine; Fig. 2 is a sideelevation, showing a portion of a disk; Fig. 3 is a vertical section ofhalf of a disk on the line AA-A, Fig. 2. Fig. 4 is a detailed view inperspective of one of the divided rings 0, and Fig. 5 is a sectionthrough one of the sockets in which the diggers are mounted.

The shaft Z) which is rectangular in cross section, is provided at eachend with a member, for example chain-wheel 7L, serving to rotate it, andnuts 2' screwed on threaded ends of said shaft. Any method may be usedfor holding the shaft in position.

The disks aa are non-rotatably mounted upon the shaft 6 side by side andseparated by rings c@ as shown in Fig. 1. Each disk at as shown in Fig.2 is divided diametrically into two separable parts, which in thepresent example are of unequal size and which are normally held firmlyto gether on shaft 1) by bolts d. Each disk at has lateral annularflanges facing the adjacent disks, as shown in Fig. 3.

The rings cc, a cross-section of one of which is shown in Fig. 3 aredivided diametrically into two parts, mounted on said sh aft 5, betweenthe disks ao. and engaged by the flanges of the adjacent disks. The sizeof the rings may vary considerably in order to allow the disks to be setat different distances apart, for the purpose hereinafter described.

The disks aa and rings cc are held as a compact and substantial unit onshaft 7) Specification of Letters Patent.

Patented Dec. 12, T916.

Serial No. 558,561.

by bolts, one of which, 7; is shown in Fig. 3, which extend from eachintermediate disk in opposite directions and connect such intermediatedisk, with the adjacent disks, on each side, said bolts beingrectangular in cross-section, and each having nuts on both of its ends.In the present example each bolt is shown as extending at one endthrough a web formed on a disk (1, and at the other end through thestock of a digger socketed in an adjacent disk a. By turning down thenuts on the threaded ends of 7c, the disks a are evidently held togethersolidly.

Each disk (1 Fig. 2 is provided with a number of tapering sockets ee,one side of each of which'has a greater radial opening than the other.These sockets are spaced at regularintervals on the circumference of thedisks. A harrow tooth or digger f is fitted in each of the sockets ce.Bolts gg as shown in Fig. 3 are passed through one side of said socket eand through the said harrow tooth. By tightening the nut on said bolts gthe said side of socket c is drawn in against the harrow tooth 7, thussecuring it substantially in socket e.

The harrow teeth or diggers are bent in such a manner as to easilypenetrate into the soil on the rotation of the machine, the direction ofrotation being the same as that of the driving wheels of the vehiclecarrying the diggers. By this means the purchase of the harrow-teeth ordiggers in the soil aids in the forward movement of the vehicle. Theshape given the diggers is such that whatever may be the forward speedof the machine at work, within the limits of practice, none of thediggers drag on the ground.

By the combined forward and rotary movement of the harrow, each point ofthe diggers describes a cycloid in space which by reason of the possiblerelations in practice between the speed of rotation and the forwardmovement is for the portion entering the soil a looped cycloid. In orderto prevent the diggers from dragging in the ground, it is only necessarythat their outer surface and all the points which can enter the soilshould be within the cycloid calculated for the maximum forward speedand for the minimum speed of rotation. The outer curvature of thebarrow-teeth is such as to comply with this condition.

The choice of the digger tools or plows used, the speed of rotation ofthe harrow or digger device, the distance apart of the disks, etc., canbe altered as rendered necessary by the nature of the soil and the depthof tillage.

Having thus fully described my invention what I claim is j 1. In arotary plowing machine, the combination with a shaft, of a plurality ofbination, with a shaft, of a plurality of ks, mounted on said shaft,each disk be ing divided diametrically into two parts. means forsecuring said parts together, said disks havinglateralannular flanges,facing the adjacent disks, and rings mounted on said shaft between thedisks and engaged by the flanges of the adjacent disks, and a pluralityof diggers secured to each disk.

3. In arotary plowing machine, the combination', with a shaft, of aplurality of disks, mounted 011 said shaft, each disk being divideddiametrically into tWo parts, means for securing said parts together,said disks having lateral annular flanges facing the adjacent diggersand rings mounted on said shaft between the disks and engaged by theflanges of the adjacent disks, said rings being divided diametricallyinto two parts, and a plurality of disks secured to each disk.

4. In a rotary plowing machine the combination, with a shaft, of aplurality of disks mounted on said shaft, each disk being divideddiametrically into two parts, means for securing said parts together,said disks having lateral annular flanges facing the adjacent disks,bolts extending from each intermediate disk in opposite directions andconnecting such intermediate disk with the adjacent disk on each side,rings mounted on said shaft between the disks and engaged by the flangesof the adjacent disks, said rings being divided diametrically into twoparts, and a plurality of diggers, removably secured to each disk.

5. In a rotary plowing machine, the com bination, with a shaft of aplurality of disks mounted on said shaft and adapte to carry plowsordiggers, each disk comprising separable sections for ready removal ofthe disk from the shaft, and bolts extending from each intermediate diskin opposite directions and connecting such intermediate disk with oneadjacent disk on each side independentl of the other disks.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

EDOUARD MARIE QUELLENNEC. lVitnesses H. C. Coxn, FREDERIC HARLE.

' Corie: of this patent may be obtained for five cents each, byaddressing the Commissioner of Patents,

' Washington, D. C.

